No need to mention msvcprt.lib here, wntmsc.mk does that

Besides, hardcoding msvcprt.lib breaks a dbgutil build where we use
msvcprtd.lib.

shell/source/tools/lngconvex/makefile.mk

@@ -54,19 +54,10 @@ APP1TARGET=$(TARGET)
 APP1OBJS=$(OBJ)$/$(TARGET).obj\
         $(OBJ)$/cmdline.obj
 
-# need msvcprt.lib for bad_cast exception
-# symbols if we compiler with exceptions
-# only valid for a tool like this
-
 APP1STDLIBS= $(SALLIB)\
             $(TOOLSLIB)\
             $(I18NISOLANGLIB)
 
-.IF "$(COM)"!="GCC"
-APP1STDLIBS+= msvcprt.lib
-#$(TOOLSLIBST) 
-.ENDIF
-
 # --- Targets ------------------------------------------------------
 
 .INCLUDE :  target.mk