cmd/internal/objabi: remove redundant word in comment

Change-Id: I9bbce94a2f36d5de28b946c94652876f01907fe6
Reviewed-on: https://go-review.googlesource.com/c/go/+/680115
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Sean Liao <sean@liao.dev>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Sean Liao <sean@liao.dev>

Author: cuishuang

src/cmd/internal/objabi/reloctype.go

@@ -466,7 +466,7 @@ func (r RelocType) IsDwTxtAddr() bool {
 // FuncCountToDwTxtAddrFlavor returns the correct DWARF .debug_addr
 // section relocation to use when compiling a package with a total of
 // fncount functions, along with the size of the ULEB128-encoded blob
-// needed to store the the eventual .debug_addr index.
+// needed to store the eventual .debug_addr index.
 func FuncCountToDwTxtAddrFlavor(fncount int) (RelocType, int) {
 	switch {
 	case fncount <= 127: