eliminate instructions from *.S which restored the stack pointer unnecessarily

src/amd64.S

@@ -76,10 +76,6 @@ sse:
 call:
    call   *0(%rbp)
    
-   // clear space reserved for memory arguments
-   movq   16(%rbp),%rcx
-   addq   %rcx,%rsp
-
    // handle return value based on expected type
    movq   40(%rbp),%rcx
 

src/cdecl.S

@@ -37,10 +37,6 @@ test:
    // call function
    call   *8(%ebp)
 
-   // clear space reserved for arguments
-   movl   16(%ebp),%ecx
-   addl   %ecx,%esp
-
    // handle return value based on expected type
    movl   20(%ebp),%ecx