Revert "runtime: map; llgo/ssa: MapUpdate"

internal/runtime/c/c.go

@@ -30,15 +30,11 @@ type (
 	FilePtr = unsafe.Pointer
 )
 
-type integer interface {
-	~int | ~uint | ~uintptr | ~int32 | ~uint32 | ~int64 | ~uint64
-}
-
 //go:linkname Str llgo.cstr
 func Str(string) *Char
 
 // llgo:link Advance llgo.advance
-func Advance[PtrT any, I integer](ptr PtrT, offset I) PtrT { return ptr }
+func Advance[PtrT any](ptr PtrT, offset int) PtrT { return ptr }
 
 //go:linkname Alloca llgo.alloca
 func Alloca(size uintptr) Pointer