Remove dashboard linter from tool dependency (#3285)

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

hack/lint-dashboards.sh

@@ -1,5 +1,7 @@
 if ! command -v dashboard-linter >/dev/null 2>&1; then
     echo "dashboard-linter is not installed"
+    echo "Installing dashboard-linter..."
+    go install github.com/grafana/dashboard-linter@latest
     exit 1;
 fi
 BASE_PATH=$(pwd)
@@ -12,5 +14,5 @@ DASHBOARD_PATH="$BASE_PATH/charts/fission-all/dashboards/*"
 
 for f in $DASHBOARD_PATH
 do
-    go tool dashboard-linter lint --strict --verbose $f
+    dashboard-linter lint --strict --verbose $f
 done