Remove unused 'classnames' dependencies

package.json

@@ -70,7 +70,6 @@
         "@babel/preset-env": "^7.3.4",
         "@babel/preset-react": "^7.0.0",
         "@babel/preset-typescript": "^7.1.0",
-        "@types/classnames": "^2.2.7",
         "@types/jest": "^24.0.9",
         "@types/react": "^16.8.6",
         "@types/react-dom": "^16.8.0",
@@ -112,9 +111,6 @@
         "webpack-cli": "^3.1.0",
         "webpack-dev-server": "^3.2.1"
     },
-    "dependencies": {
-        "classnames": "^2.2.6"
-    },
     "peerDependencies": {
         "react": "^16.3.2",
         "react-dom": "^16.3.3"

yarn.lock

@@ -744,11 +744,6 @@
   resolved "https://registry.yarnpkg.com/@sheerun/mutationobserver-shim/-/mutationobserver-shim-0.3.2.tgz#8013f2af54a2b7d735f71560ff360d3a8176a87b"
   integrity sha512-vTCdPp/T/Q3oSqwHmZ5Kpa9oI7iLtGl3RQaA/NyLHikvcrPxACkkKVr/XzkSPJWXHRhKGzVvb0urJsbMlRxi1Q==
 
-"@types/classnames@^2.2.7":
-  version "2.2.7"
-  resolved "https://registry.yarnpkg.com/@types/classnames/-/classnames-2.2.7.tgz#fb68cc9be8487e6ea5b13700e759bfbab7e0fefd"
-  integrity sha512-rzOhiQ55WzAiFgXRtitP/ZUT8iVNyllEpylJ5zHzR4vArUvMB39GTk+Zon/uAM0JxEFAWnwsxC2gH8s+tZ3Myg==
-
 "@types/estree@0.0.39":
   version "0.0.39"
   resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.39.tgz#e177e699ee1b8c22d23174caaa7422644389509f"
@@ -1730,11 +1725,6 @@ class-utils@^0.3.5:
     isobject "^3.0.0"
     static-extend "^0.1.1"
 
-classnames@^2.2.6:
-  version "2.2.6"
-  resolved "https://registry.yarnpkg.com/classnames/-/classnames-2.2.6.tgz#43935bffdd291f326dad0a205309b38d00f650ce"
-  integrity sha512-JR/iSQOSt+LQIWwrwEzJ9uk0xfN3mTVYMwt1Ir5mUcSN6pU+V4zQFFaJsclJbPuAUQH+yfWef6tm7l1quW3C8Q==
-
 clean-css@4.2.x:
   version "4.2.1"
   resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-4.2.1.tgz#2d411ef76b8569b6d0c84068dabe85b0aa5e5c17"