chart2: avoid -Werror=deprecated-copy (GCC trunk towards GCC 9)

...by removing explicitly user-provided functions that do the same as their
implicitly-defined counterparts, but may prevent implicitly declared copy
functions from being defined as non-deleted in the future.  (Even if such a
user-provided function was declared non-inline in an include file, the
apparently-used implicitly-defined copy functions are already inline, so why
bother with non-inline functions.)

Change-Id: If96d3b6ca79416127933e7f22e3628361604efe1
Reviewed-on: https://gerrit.libreoffice.org/58069
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

chart2/source/inc/ObjectIdentifier.hxx

@@ -92,7 +92,6 @@ public:
     ObjectIdentifier( const css::uno::Reference< css::drawing::XShape >& rxShape );
     ObjectIdentifier( const css::uno::Any& rAny );
 
-    ObjectIdentifier( const ObjectIdentifier& rOID );
     bool operator==( const ObjectIdentifier& rOID ) const;
     bool operator!=( const ObjectIdentifier& rOID ) const;
     bool operator<( const ObjectIdentifier& rOID ) const;

chart2/source/tools/ObjectIdentifier.cxx

@@ -271,12 +271,6 @@ ObjectIdentifier::ObjectIdentifier( const Any& rAny )
     }
 }
 
-ObjectIdentifier::ObjectIdentifier( const ObjectIdentifier& rOID )
-    :m_aObjectCID( rOID.m_aObjectCID )
-    ,m_xAdditionalShape( rOID.m_xAdditionalShape )
-{
-}
-
 bool ObjectIdentifier::operator==( const ObjectIdentifier& rOID ) const
 {
     return areIdenticalObjects( m_aObjectCID, rOID.m_aObjectCID ) &&