Remove unused variables, parameters and procedures.

Remove unused variables, parameters and procedures.

2021-08-02  Gaius Mulley  <gaius.mulley@southwales.ac.uk>

gcc/m2/

	* gm2-compiler/M2BasicBlock.mod (ConvertQuads2BasicBlock): Assign
	CurrentBB to NIL.  (Sub): Commented out.  (DisplayBasicBlocks):
	Commented out.  (DisplayBlock): Commented out.
	* gm2-compiler/M2Code.mod (PrintModule): Commented out.
	(DisplayQuadsInScope): Commented out.  (DisplayQuadNumbers):
	Commented out.
	* gm2-compiler/M2Error.mod: Import NulName. (DoFormat1) initialize
	n.  (DoFormat2) initialize n.
	* gm2-compiler/M2Optimize.mod (DeleteUnReachableProcedures):
	Commented out.
	* gm2-compiler/M2Options.mod:  Commented out string garbage
	debugging procedures.  (SetDebugging) Commented out.
	* gm2-compiler/M2Printf.mod (IsDigit): Commented out.
	* gm2-compiler/P1SymBuild.mod (CheckProcedure): Removed.
	(CheckFileName) Commented out.  (BuildHiddenType) Remove Sym.
	Use Assert to check return value.
	* gm2-compiler/P2SymBuild.def (SeenBoolean): Remove sym parameter.
	(SeenZType): Remove sym parameter.  (SeenRType): Remove sym
	parameter.  (SeenCType): Remove sym parameter.
	* gm2-compiler/P2SymBuild.mod (SeenBoolean): Remove sym parameter.
	(SeenZType): Remove sym parameter.  (SeenRType): Remove sym
	parameter.  (SeenCType): Remove sym parameter.
	(StartBuildEnumeration): Remove name.  (FailParameter) Use default
	ELSE and Assert.  (BuildNulParam) Removed.  (BuildFieldRecord)
	Remove name.  Assign Field to NulSym.  (BuildVarientSelector)
	Remove Parent.
	* gm2-compiler/SymbolTable.def (GCFieldVarient): Removed.
	(FillInUnboundedFields):  Remove field.
	* gm2-compiler/gm2lcc.mod (CollectObjects): remove s.
	(WriteModuleName) Removed.
	* gm2-compiler/gm2lorder.mod (InitRuntimeModules) Remove l.
	* gm2-gcc/m2expr.c (divFloorOverflowPosPos) Remove unused
	parameters.  (divFloorOverflowPosNeg) Remove unused parameters.
	(divFloorOverflowNegPos) Remove unused parameters.

libgm2/

	* libm2pim/Makefile.in: (Rebuilt).

Signed-off-by: Gaius Mulley <gaius.mulley@southwales.ac.uk>