Compiler: Revert "Fix runtime error in variadic functions that return strings."

Better fix by dvander will be provided later.

compiler/libpc300/sc4.c

@@ -410,16 +410,6 @@ SC_FUNC void rvalue(value *lval)
   } /* if */
 }
 
-/* dereference
- *
- * Get a cell from a memory address stored in the primary register
- */
-SC_FUNC void dereference(void)
-{
-  stgwrite("\tload.i\n");
-  code_idx+=opcodes(1);
-}
-
 /* Get the address of a symbol into the primary or alternate register (used
  * for arrays, and for passing arguments by reference).
  */
@@ -839,17 +829,6 @@ SC_FUNC void defstorage(void)
   stgwrite("dump ");
 }
 
-/*
- *  Copies frame address to primary register
- */
-
-SC_FUNC void getfrm(void)
-{
-  stgwrite("\tlctrl 5\n");
-  code_idx+=opcodes(1)+opargs(1);
-}
-
-
 /**
  *  Inclrement/decrement stack pointer. Note that this routine does
  *  nothing if the delta is zero.