BUG: `Styler.hide_columns` fails when not sparsifying

[attack68]

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• I have confirmed this bug exists on the master branch of pandas.

Reproducible Example

pd.options.styler.sparse.columns=False

midx = MultiIndex.from_product([[1, 2],["a", "a", "b"]], names=["zero", "one"])
df = DataFrame(9, index=midx, columns=midx)
styler = df.style.hide_columns((1, "a"))
styler

Issue Description

Expected Behavior

Columns are hidden in the header row

Installed Versions

Replace this line with the output of pd.show_versions()

[attack68]

Actually just noticed the exact same thing for hide_index, should have checked before..