[DataLayout] Remove i1 alignment entry

I don't think we need to explicitly specify i1 alignment, as this
is going to fall back to i8 alignment.

This may change behavior if a data layout explicitly sets i8 alignment
without also setting i1 layout, but I'd expect this to be a bug
fix in that case.

Author: nikic

llvm/lib/IR/DataLayout.cpp

@@ -187,7 +187,6 @@ const char *DataLayout::getManglingComponent(const Triple &T) {
 // Default primitive type specifications.
 // NOTE: These arrays must be sorted by type bit width.
 constexpr DataLayout::PrimitiveSpec DefaultIntSpecs[] = {
-    {1, Align::Constant<1>(), Align::Constant<1>()},  // i1:8:8
     {8, Align::Constant<1>(), Align::Constant<1>()},  // i8:8:8
     {16, Align::Constant<2>(), Align::Constant<2>()}, // i16:16:16
     {32, Align::Constant<4>(), Align::Constant<4>()}, // i32:32:32