configure: Drop GccLT46

Authored by bgamari on Sep 24 2019, 5:39 PM.

Description

configure: Drop GccLT46

GCC 4.6 was released 7 years ago. I think we can finally assume that
it's available. This is a simplification prompted by Trac #15742.

Details

Committed
Marge Bot <ben+marge-bot@smart-cactus.org>Fri, Oct 25, 8:03 AM
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rGHC02822d847c0b: aclocal: A bit of reformatting
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Marge Bot <ben+marge-bot@smart-cactus.org> committed rGHC519f5162614d: configure: Drop GccLT46 (authored by bgamari).Fri, Oct 25, 8:03 AM