Drop backward compatibility hack for fmtlib < 8
I implemented a hack to fix builds against fmt < 8 (see !1455 (comment 6781515)).
In %v37r0 we update the LCG baseline version used in CI tests and at that point we can revert the hack.
I implemented a hack to fix builds against fmt < 8 (see !1455 (comment 6781515)).
In %v37r0 we update the LCG baseline version used in CI tests and at that point we can revert the hack.