Debugger: Remove needless explicit copy constructors.

These worked in identical fashion to what the default copy
constructors would be, but their mere presence marks the class
as being "non-trivially copyable," which means that memcpy'ing
it is now a -Werror on GCC 8.

We have to be careful when making this change, though: classes
which *are* trivially copyable can be passed inside registers
on x86_64, so changes like these break ABI in a dangerous way.
These classes is private, so it should not be a problem, but
for other classes (e.g. BRect, BPoint) we cannot fix them
properly right now.

headers/private/debugger/arch/Register.h

@@ -32,7 +32,6 @@ public:
 									uint32 bitSize, uint32 valueType,
 									register_type type, bool calleePreserved);
 										// name will not be cloned
-								Register(const Register& other);
 
 			int32				Index() const		{ return fIndex; }
 			const char*			Name() const		{ return fName; }

headers/private/debugger/types/SourceLocation.h

@@ -17,20 +17,6 @@ public:
 	{
 	}
 
-	SourceLocation(const SourceLocation& other)
-		:
-		fLine(other.fLine),
-		fColumn(other.fColumn)
-	{
-	}
-
-	SourceLocation& operator=(const SourceLocation& other)
-	{
-		fLine = other.fLine;
-		fColumn = other.fColumn;
-		return *this;
-	}
-
 	bool operator==(const SourceLocation& other) const
 	{
 		return fLine == other.fLine && fColumn == other.fColumn;

headers/private/debugger/types/TargetAddressRange.h

@@ -26,20 +26,6 @@ public:
 	{
 	}
 
-	TargetAddressRange(const TargetAddressRange& other)
-		:
-		fStart(other.fStart),
-		fSize(other.fSize)
-	{
-	}
-
-	TargetAddressRange& operator=(const TargetAddressRange& other)
-	{
-		fStart = other.fStart;
-		fSize = other.fSize;
-		return *this;
-	}
-
 	bool operator==(const TargetAddressRange& other) const
 	{
 		return fStart == other.fStart && fSize == other.fSize;

src/kits/debugger/arch/Register.cpp

@@ -43,16 +43,3 @@ Register::Register(int32 index, const char* name, uint32 bitSize,
 			break;
 	}
 }
-
-
-Register::Register(const Register& other)
-	:
-	fIndex(other.fIndex),
-	fName(other.fName),
-	fBitSize(other.fBitSize),
-	fValueType(other.fValueType),
-	fFormat(other.fFormat),
-	fType(other.fType),
-	fCalleePreserved(other.fCalleePreserved)
-{
-}