build: remove goplay from run.bash and run.bat

TBR=rsc
R=golang-codereviews
CC=golang-codereviews
https://golang.org/cl/106730043

src/run.bash

@@ -197,11 +197,6 @@ time ./run || exit 1
 time ./run || exit 1
 ) || exit $?
 
-echo
-echo '#' ../misc/goplay
-go build ../misc/goplay
-rm -f goplay
-
 [ "$GOOS" == nacl ] ||
 [ "$GOARCH" == arm ] ||
 (xcd ../test/bench/shootout

src/run.bat

@@ -73,11 +73,6 @@ if errorlevel 1 goto fail
 echo.
 :norace
 
-echo # ..\misc\goplay
-go build ..\misc\goplay
-if errorlevel 1 goto fail
-echo.
-
 echo # ..\test\bench\go1
 go test ..\test\bench\go1
 if errorlevel 1 goto fail