Removing less-plugin-clean-css from package list. Needs to be global?

package-lock.json

@@ -4,12 +4,6 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
-    "amdefine": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
-      "dev": true
-    },
     "argparse": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
@@ -25,16 +19,6 @@
       "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24=",
       "dev": true
     },
-    "clean-css": {
-      "version": "3.4.28",
-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-3.4.28.tgz",
-      "integrity": "sha1-vxlF6C/ICPVWlebd6uwBQA79A/8=",
-      "dev": true,
-      "requires": {
-        "commander": "2.8.1",
-        "source-map": "0.4.4"
-      }
-    },
     "coa": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/coa/-/coa-2.0.1.tgz",
@@ -50,15 +34,6 @@
       "integrity": "sha1-FopHAXVran9RoSzgyXv6KMCE7WM=",
       "dev": true
     },
-    "commander": {
-      "version": "2.8.1",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
-      "integrity": "sha1-Br42f+v9oMMwqh4qBy09yXYkJdQ=",
-      "dev": true,
-      "requires": {
-        "graceful-readlink": "1.0.1"
-      }
-    },
     "css-select": {
       "version": "1.3.0-rc0",
       "resolved": "https://registry.npmjs.org/css-select/-/css-select-1.3.0-rc0.tgz",
@@ -226,12 +201,6 @@
       "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==",
       "dev": true
     },
-    "graceful-readlink": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz",
-      "integrity": "sha1-TK+tdrxi8C+gObL5Tpo906ORpyU=",
-      "dev": true
-    },
     "has": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/has/-/has-1.0.1.tgz",
@@ -278,15 +247,6 @@
         "esprima": "4.0.0"
       }
     },
-    "less-plugin-clean-css": {
-      "version": "1.5.1",
-      "resolved": "https://registry.npmjs.org/less-plugin-clean-css/-/less-plugin-clean-css-1.5.1.tgz",
-      "integrity": "sha1-zFeveqM5iVflbezr5jy2DCNClwM=",
-      "dev": true,
-      "requires": {
-        "clean-css": "3.4.28"
-      }
-    },
     "mdn-data": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/mdn-data/-/mdn-data-1.1.0.tgz",
@@ -357,15 +317,6 @@
       "integrity": "sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==",
       "dev": true
     },
-    "source-map": {
-      "version": "0.4.4",
-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
-      "integrity": "sha1-66T12pwNyZneaAMti092FzZSA2s=",
-      "dev": true,
-      "requires": {
-        "amdefine": "1.0.1"
-      }
-    },
     "sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",

package.json

@@ -49,7 +49,6 @@
   "license": "(OFL-1.1 AND MIT)",
   "dependencies": {},
   "devDependencies": {
-    "less-plugin-clean-css": "^1.5.1",
     "svgo": "^1.0.4"
   },
   "engines": {