remove import of module checksupport

frontend/classify.dcl

 definition module classify
 
-import syntax, checksupport, transform
+import syntax, transform
 
 CUnusedLazy				:== -1
 CUnusedStrict			:== -2

frontend/classify.icl

@@ -6,7 +6,7 @@ implementation module classify
 SwitchMultimatchClassification multi no_multi	:== multi
 SwitchNewOld new old							:== new
 
-import syntax, checksupport, transform
+import syntax, transform
 import StdStrictLists
 
 ::	CleanupInfo :== [ExprInfoPtr]

frontend/typereify.dcl

@@ -5,8 +5,7 @@ definition module typereify
 
 from syntax import
 	::Ident, ::FunDef, ::IndexRange, ::TypeHeaps,
-	::SymbolTable, ::SymbolTableEntry, ::Heap
-from checksupport import
+	::SymbolTable, ::SymbolTableEntry, ::Heap,
 	::DclModule, ::CommonDefs, ::VarHeap, ::VarInfo
 from predef import
 	::PredefinedSymbols, ::PredefinedSymbol

frontend/typereify.icl

@@ -3,9 +3,8 @@
 */
 implementation module typereify
 
-import checksupport
+import syntax
 import typesupport
-// import StdDebug
 
 typeFunName :: Ident -> {#Char}
 typeFunName {id_name}