remove misleading requirements file

Author: Chilipp

README.rst

@@ -10,7 +10,7 @@ Graphical User Interface for the psyplot package
     * - docs
       - |docs|
     * - tests
-      - |circleci| |appveyor| |requires| |codecov|
+      - |circleci| |appveyor| |codecov|
     * - package
       - |version| |conda| |github| |zenodo|
     * - implementations
@@ -32,10 +32,6 @@ Graphical User Interface for the psyplot package
     :alt: Coverage
     :target: https://codecov.io/gh/psyplot/psyplot-gui
 
-.. |requires| image:: https://requires.io/github/psyplot/psyplot-gui/requirements.svg?branch=master
-    :alt: Requirements Status
-    :target: https://requires.io/github/psyplot/psyplot-gui/requirements/?branch=master
-
 .. |version| image:: https://img.shields.io/pypi/v/psyplot-gui.svg?style=flat
     :alt: PyPI Package latest release
     :target: https://pypi.python.org/pypi/psyplot-gui

docs/index.rst

@@ -18,7 +18,7 @@ main project on examples on the possibilities with psyplot_.
         * - docs
           - |docs|
         * - tests
-          - |circleci| |appveyor| |requires| |codecov|
+          - |circleci| |appveyor| |codecov|
         * - package
           - |version| |conda| |github| |zenodo|
         * - implementations
@@ -40,10 +40,6 @@ main project on examples on the possibilities with psyplot_.
         :alt: Coverage
         :target: https://codecov.io/gh/psyplot/psyplot-gui
 
-    .. |requires| image:: https://requires.io/github/psyplot/psyplot-gui/requirements.svg?branch=master
-        :alt: Requirements Status
-        :target: https://requires.io/github/psyplot/psyplot-gui/requirements/?branch=master
-
     .. |version| image:: https://img.shields.io/pypi/v/psyplot-gui.svg?style=flat
         :alt: PyPI Package latest release
         :target: https://pypi.python.org/pypi/psyplot-gui