cmd/internal/obj/riscv: remove ACFLWSP/ACFSWSP and ACFLW/ACFSW

These are RV32-only instructions that will not be implemented.

Updates #71105

Change-Id: Ie386fe36e56f1151bb8756088dd79804584317c0
Reviewed-on: https://go-review.googlesource.com/c/go/+/702395
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Meng Zhuo <[email protected]>
Reviewed-by: Mark Ryan <[email protected]>
Reviewed-by: Mark Freeman <[email protected]>
Reviewed-by: Michael Pratt <[email protected]>

Author: 4a6f656c

src/cmd/internal/obj/riscv/anames.go

@@ -588,22 +588,18 @@ const (
 
 	// 26.3.1: Compressed Stack-Pointer-Based Loads and Stores
 	ACLWSP
-	ACFLWSP
 	ACLDSP
 	ACFLDSP
 	ACSWSP
 	ACSDSP
-	ACFSWSP
 	ACFSDSP
 
 	// 26.3.2: Compressed Register-Based Loads and Stores
 	ACLW
 	ACLD
-	ACFLW
 	ACFLD
 	ACSW
 	ACSD
-	ACFSW
 	ACFSD
 
 	// 26.4: Compressed Control Transfer Instructions