fix(ci)_: drop clean.sh script from cleanup stage

Because it keeps failing due to paths that appear alive but are not.

Signed-off-by: Jakub Sokołowski <jakub@status.im>

ci/tools/Jenkinsfile.nix-cache

@@ -123,7 +123,6 @@ pipeline {
   post {
     always { script {
       nix.shell('nix-store --optimize', pure: false)
-      nix.shell('nix/scripts/clean.sh', pure: false)
     } }
   }
 }

nix/scripts/clean.sh

@@ -62,7 +62,7 @@ findByRegex() {
 
     # list of store entries to delete
     declare -a found
-    
+
     # for each entry find the source and derivation
     for mainPath in ${drvPaths}; do
         findRelated "${mainPath}"
@@ -87,7 +87,7 @@ nixResultPath="${1}"
 if [[ -n "${nixResultPath}" ]]; then
     # if provided we can narrow down what to clean based on result path
     toDelete=$(findByResult "${nixResultPath}")
-else 
+else
     # use regular expression that should match all status-mobile build artifacts
     toDelete=$(findByRegex '.*-status-(mobile|go)-(shell|source|build|patched-npm-gradle-modules).*')
 fi