Remove obsolete SAL_FALLTHROUGH completely

...after 7ffdd830
"HAVE_CPP_ATTRIBUTE_FALLTHROUGH is always true now"

Change-Id: I54e5ff4e036a6bb3e5774d1c0524158aae18e937
Reviewed-on: https://gerrit.libreoffice.org/64800
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

accessibility/source/standard/vclxaccessibletoolbox.cxx

@@ -629,7 +629,7 @@ void VCLXAccessibleToolBox::ProcessWindowEvent( const VclWindowEvent& rVclWindow
             }
             m_aAccessibleChildren.clear();
 
-            SAL_FALLTHROUGH; // call base class
+            [[fallthrough]]; // call base class
         }
 
         default:

basctl/source/basicide/basides1.cxx

@@ -1071,7 +1071,7 @@ void Shell::GetState(SfxItemSet &rSet)
                     }
                 }
             }
-            SAL_FALLTHROUGH;
+            [[fallthrough]];
 
             case SID_BASICIDE_NEWMODULE:
             case SID_BASICIDE_NEWDIALOG:

basctl/source/basicide/bastype3.cxx

@@ -333,7 +333,7 @@ SbxVariable* SbTreeListBox::FindVariable(weld::TreeIter* pEntry)
                 break;
             case OBJ_TYPE_DOCUMENT_OBJECTS:
                 bDocumentObjects = true;
-                SAL_FALLTHROUGH;
+                [[fallthrough]];
             case OBJ_TYPE_USERFORMS:
             case OBJ_TYPE_NORMAL_MODULES:
             case OBJ_TYPE_CLASS_MODULES:

basegfx/source/polygon/b2dlinegeometry.cxx

@@ -812,7 +812,7 @@ namespace basegfx
                     }
                     else
                     {
-                        SAL_FALLTHROUGH; // wanted fall-through to default
+                        [[fallthrough]]; // wanted fall-through to default
                     }
                 }
                 default: // B2DLineJoin::Bevel

basegfx/source/polygon/b2dsvgpolypolygon.cxx

@@ -141,7 +141,7 @@ namespace basegfx
                             o_rPolyPolygon.append(aCurrPoly);
                             aCurrPoly.clear();
                         }
-                        SAL_FALLTHROUGH; // to add coordinate data as 1st point of new polygon
+                        [[fallthrough]]; // to add coordinate data as 1st point of new polygon
                     }
                     case 'l' :
                     case 'L' :
@@ -181,7 +181,7 @@ namespace basegfx
                     case 'h' :
                     {
                         bRelative = true;
-                        SAL_FALLTHROUGH;
+                        [[fallthrough]];
                     }
                     case 'H' :
                     {
@@ -211,7 +211,7 @@ namespace basegfx
                     case 'v' :
                     {
                         bRelative = true;
-                        SAL_FALLTHROUGH;
+                        [[fallthrough]];
                     }
                     case 'V' :
                     {
@@ -241,7 +241,7 @@ namespace basegfx
                     case 's' :
                     {
                         bRelative = true;
-                        SAL_FALLTHROUGH;
+                        [[fallthrough]];
                     }
                     case 'S' :
                     {
@@ -300,7 +300,7 @@ namespace basegfx
                     case 'c' :
                     {
                         bRelative = true;
-                        SAL_FALLTHROUGH;
+                        [[fallthrough]];
                     }
                     case 'C' :
                     {
@@ -350,7 +350,7 @@ namespace basegfx
                     case 'q' :
                     {
                         bRelative = true;
-                        SAL_FALLTHROUGH;
+                        [[fallthrough]];
                     }
                     case 'Q' :
                     {
@@ -401,7 +401,7 @@ namespace basegfx
                     case 't' :
                     {
                         bRelative = true;
-                        SAL_FALLTHROUGH;
+                        [[fallthrough]];
                     }
                     case 'T' :
                     {
@@ -475,7 +475,7 @@ namespace basegfx
                     case 'a' :
                     {
                         bRelative = true;
-                        SAL_FALLTHROUGH;
+                        [[fallthrough]];
                     }
                     case 'A' :
                     {

basic/source/comp/loops.cxx

@@ -547,7 +547,7 @@ void SbiParser::Resume()
                 aGen.Gen( SbiOpcode::RESUME_, 0 );
                 break;
             }
-            SAL_FALLTHROUGH;
+            [[fallthrough]];
         case SYMBOL:
             if( MayBeLabel() )
             {
@@ -556,7 +556,7 @@ void SbiParser::Resume()
                 Next();
                 break;
             }
-            SAL_FALLTHROUGH;
+            [[fallthrough]];
         default:
             Error( ERRCODE_BASIC_LABEL_EXPECTED );
     }

basic/source/sbx/sbxbool.cxx

@@ -30,7 +30,7 @@ enum SbxBOOL ImpGetBool( const SbxValues* p )
     {
         case SbxNULL:
             SbxBase::SetError( ERRCODE_BASIC_CONVERSION );
-            SAL_FALLTHROUGH;
+            [[fallthrough]];
         case SbxEMPTY:
             nRes = SbxFALSE; break;
         case SbxCHAR:

basic/source/sbx/sbxbyte.cxx

@@ -33,7 +33,7 @@ start:
     {
         case SbxNULL:
             SbxBase::SetError( ERRCODE_BASIC_CONVERSION );
-            SAL_FALLTHROUGH;
+            [[fallthrough]];
         case SbxEMPTY:
             nRes = 0; break;
         case SbxCHAR:

basic/source/sbx/sbxchar.cxx

@@ -33,7 +33,7 @@ start:
     {
         case SbxNULL:
             SbxBase::SetError( ERRCODE_BASIC_CONVERSION );
-            SAL_FALLTHROUGH;
+            [[fallthrough]];
         case SbxEMPTY:
             nRes = 0; break;
         case SbxCHAR: