removed extra bin/bash line (#7603)

# What changes were proposed in this pull request?

This pull request removes extra #!/bin/bash line from the
trino-connector/integration-test/trino-test-tools/download_jar.sh file.

Closes #7587

Co-authored-by: Spiritedswordsman <[email protected]>

Author: 2 people

trino-connector/integration-test/trino-test-tools/download_jar.sh

@@ -18,7 +18,6 @@
 # under the License.
 
 set -e
-#!/bin/bash
 
 # Function to download a JAR file if it does not already exist
 download_jar() {