remove try/catch (suggestion from @camdecoster)

Co-authored-by: Cameron DeCoster <cameron.decoster@gmail.com>

Author: emilykl

plotly/io/_kaleido.py

@@ -11,10 +11,7 @@
 from plotly.io._defaults import defaults
 from _plotly_utils.optional_imports import get_module
 
-try:
-    kaleido = get_module("kaleido", should_load=True)
-except ImportError:
-    kaleido = None
+kaleido = get_module("kaleido", should_load=True)
 
 PLOTLY_GET_CHROME_ERROR_MSG = """