Don't skip an erroneous comma when parsing from

Currently we skip an extra comma when "with context" is not provided to
the "from" statement. This allows invalid code such as this:

  {% from "functions.html" import my_function,, %}

The primary issue with this is that it is not consistent when providing
"with context". The following code throws an error, contrary to the
previous example:

  {% from "functions.html" import my_function,, with context %}

It seems that the comma skipping was originally found in 0611e49 and was
accidentally put inside the "with context" check in ea847c5. It was then
updated to use "skip_if" in fdf9530.

There doesn't seem to be any reason for this check existing, as
double commas should never be allowed and serve no purpose in the
statement.

0 files changed, 0 insertions, 0 deletions