Remove debug integer literal together

Same thing from version but for debug

Author: MrcSnm

spec/version.dd

@@ -407,7 +407,6 @@ $(H2 $(LNAME2 debug, Debug Condition))
 $(GRAMMAR
 $(GNAME DebugCondition):
     $(D debug)
-    $(D debug $(LPAREN)) $(GLINK_LEX IntegerLiteral) $(D $(RPAREN))
     $(D debug $(LPAREN)) $(GLINK_LEX Identifier) $(D $(RPAREN))
 )
 
@@ -422,12 +421,7 @@ $(GNAME DebugCondition):
         )
 
         $(P The $(D debug) condition is satisfied when the $(D -debug) switch is
-        passed to the compiler or when the debug level is >= 1.
-        )
-
-        $(P The $(D debug $(LPAREN)) $(I IntegerLiteral) $(D $(RPAREN)) condition is satisfied
-        when the debug
-        level is $(D >=) $(I IntegerLiteral).
+        passed to the compiler.
         )
 
         $(P The $(D debug $(LPAREN)) $(I Identifier) $(D $(RPAREN)) condition is satisfied
@@ -466,10 +460,9 @@ $(H2 $(LNAME2 debug_specification, Debug Specification))
 $(GRAMMAR
 $(GNAME DebugSpecification):
     $(D debug =) $(GLINK_LEX Identifier) $(D ;)
-    $(D debug =) $(GLINK_LEX IntegerLiteral) $(D ;)
 )
 
-        $(P Debug identifiers and levels are set either by the command line switch
+        $(P Debug identifiers are set either by the command line switch
         $(D -debug) or by a $(I DebugSpecification).
         )
 
@@ -494,12 +487,11 @@ debug = foo;    // error, foo used before set
         )
 
 ------
-debug(IntegerLiteral) { } // add in debug code if debug level is >= IntegerLiteral
 debug(identifier) { } // add in debug code if debug keyword is identifier
 ------
 
         $(P These are presumably set by the command line as
-        $(D -debug=)$(I n) and $(D -debug=)$(I identifier).
+        and $(D -debug=)$(I identifier).
         )
 
 $(H2 $(LNAME2 staticif, Static If Condition))