Light editing to scripts in hack/gofmt (#2236)

* Update gofmt.sh

Removed duplicate shebang interpreter directive: `#!/bin/bash`

* Update boilerplate.sh

Removed duplicate shebang interpreter directive.

hack/boilerplate.sh

@@ -14,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-#!/bin/bash
-
 # Ignore these paths in the following tests.
 ignore="vendor\|out"
 BOILERPLATEDIR=./hack/boilerplate

hack/gofmt.sh

@@ -15,8 +15,6 @@
 # limitations under the License.
 
 
-#!/bin/bash
-
 files=$(find . -name "*.go" | grep -v vendor/ | xargs gofmt -l -s)
 if [[ $files ]]; then
     echo "Gofmt errors in files:"