[OPENJDK-2806] Remove value for S2I_ENABLE_JLINK

S2I_ENABLE_JLINK is a configuration environment variable, not an
informational one, and so the default should be unset, rather than
"false".

https://issues.redhat.com/browse/OPENJDK-2806

Signed-off-by: Jonathan Dowland <[email protected]>

Author: jmtd

modules/s2i/core/module.yaml

@@ -116,7 +116,6 @@ envs:
   description: ^
     Enables the Jdeps/JLink workflow to minimize JRE size
   example: "false"
-  value: "false"
 
 run:
   cmd: