Remove redundant conda bdage from README

Author: tpaviot

README.md

@@ -1,5 +1,4 @@
 [![Azure Build Status](https://dev.azure.com/tpaviot/pythonocc-core/_apis/build/status/tpaviot.pythonocc-core?branchName=master)](https://dev.azure.com/tpaviot/pythonocc-core/_build?definitionId=2)
-[![Conda installer](https://anaconda.org/conda-forge/pythonocc-core/badges/installer/conda.svg)](https://anaconda.org/conda-forge/pythonocc-core)
 [![Downloads Badge](https://anaconda.org/conda-forge/pythonocc-core/badges/downloads.svg)](https://anaconda.org/conda-forge/pythonocc-core)
 [![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/tpaviot/pythonocc-core.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/tpaviot/pythonocc-core/context:python)
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/67c121324b8d4f37bc27029464c87020)](https://www.codacy.com/app/tpaviot/pythonocc-core?utm_source=github.com&utm_medium=referral&utm_content=tpaviot/pythonocc-core&utm_campaign=Badge_Grade)