reflect, runtime: remove *UnsafePointer wrappers for functions

This was needed in the past because LLVM used typed pointers and there
was a mismatch between pointer types. But we've dropped support for
typed pointers a while ago so now we can remove these wrappers.

This is just a cleanup, it shouldn't have any practical effect.

src/runtime/chan.go

@@ -148,12 +148,6 @@ func chanLen(c *channel) int {
 	return int(c.bufUsed)
 }
 
-// wrapper for use in reflect
-func chanLenUnsafePointer(p unsafe.Pointer) int {
-	c := (*channel)(p)
-	return chanLen(c)
-}
-
 // Return the capacity of this chan, called from the cap builtin.
 // A nil chan is defined as having capacity 0.
 //
@@ -165,12 +159,6 @@ func chanCap(c *channel) int {
 	return int(c.bufSize)
 }
 
-// wrapper for use in reflect
-func chanCapUnsafePointer(p unsafe.Pointer) int {
-	c := (*channel)(p)
-	return chanCap(c)
-}
-
 // resumeRX resumes the next receiver and returns the destination pointer.
 // If the ok value is true, then the caller is expected to store a value into this pointer.
 func (ch *channel) resumeRX(ok bool) unsafe.Pointer {