remove npm tag

Author: timkpaine

README.md

@@ -8,7 +8,6 @@ An orchestration layer for plots and tables, dummy datasets, widgets, research,
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 [![PyPI](https://img.shields.io/pypi/l/pylantern.svg)](https://pypi.python.org/pypi/pylantern)
 [![PyPI](https://img.shields.io/pypi/v/pylantern.svg)](https://pypi.python.org/pypi/pylantern)
-[![npm](https://img.shields.io/npm/v/pylantern.svg)](https://www.npmjs.com/package/pylantern)
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