Eliminate unnecessary pinned dependencies

{{cookiecutter.app_name}}/Pipfile

@@ -6,15 +6,11 @@ name = "pypi"
 [packages]
 # Flask
 Flask = "==1.0.3"
-MarkupSafe = "==1.1.1"
 Werkzeug = "==0.15.4"
-Jinja2 = "==2.10.1"
-itsdangerous = "==1.1.0"
 click = ">=5.0"
 
 # Database
 Flask-SQLAlchemy = "==2.4.0"
-psycopg2-binary = "==2.8.2"
 SQLAlchemy = "==1.3.4"
 
 # Migrations
@@ -61,4 +57,3 @@ flake8-isort = "==2.7.0"
 flake8-quotes = "==2.0.1"
 isort = "==4.3.20"
 pep8-naming = "==0.8.2"
-

{{cookiecutter.app_name}}/package.json

@@ -43,8 +43,6 @@
     "less": "^3.9.0",
     "mini-css-extract-plugin": "^0.7.0",
     "raw-loader": "^3.0.0",
-    "style-loader": "^0.23.1",
-    "sync-exec": "^0.6.2",
     "url-loader": "^2.0.0",
     "webpack-cli": "^3.3.2",
     "webpack-dev-server": "^3.5.1",

{{cookiecutter.app_name}}/requirements/prod.txt

@@ -2,15 +2,11 @@
 
 # Flask
 Flask==1.0.2
-MarkupSafe==1.0
 Werkzeug==0.14.1
-Jinja2==2.10
-itsdangerous==1.1.0
 click>=5.0
 
 # Database
 Flask-SQLAlchemy==2.3.2
-psycopg2-binary==2.8.2
 SQLAlchemy==1.2.11
 
 # Migrations