Remove executable permissions and shebang from component-platforms.sh

Signed-off-by: Felix Conway <felix.conway@arm.com>
diff --git a/tests/scripts/components-platform.sh b/tests/scripts/components-platform.sh
old mode 100755
new mode 100644
index 9831b8f..824e5ff
--- a/tests/scripts/components-platform.sh
+++ b/tests/scripts/components-platform.sh
@@ -1,5 +1,3 @@
-#!/bin/bash
-
 # components-platform.sh
 #
 # Copyright The Mbed TLS Contributors