[doc] Remove unsafe-fp-math references (#164579)

Stop mentioning `unsafe-fp-math` related things in documents.

Author: paperchalice

llvm/docs/CommandGuide/llc.rst

@@ -125,13 +125,6 @@ End-user Options
 
  Enable setting the FP exceptions build attribute not to use exceptions.
 
-.. option:: --enable-unsafe-fp-math
-
- Enable optimizations that make unsafe assumptions about IEEE math (e.g. that
- addition is associative) or may not work for all input ranges.  These
- optimizations allow the code generator to make use of some instructions which
- would otherwise not be usable (such as ``fsin`` on X86).
-
 .. option:: --stats
 
  Print statistics recorded by code-generation passes.

llvm/docs/CommandGuide/lli.rst

@@ -107,11 +107,6 @@ FLOATING POINT OPTIONS
 
  Enable optimizations that assume no NAN values.
 
-.. option:: -enable-unsafe-fp-math
-
- Causes :program:`lli` to enable optimizations that may decrease floating point
- precision.
-
 .. option:: -soft-float
 
  Causes :program:`lli` to generate software floating point library calls instead of

llvm/docs/SourceLevelDebugging.rst

@@ -674,7 +674,7 @@ Compiled to LLVM, this function would be represented like this:
     ret void, !dbg !24
   }
 
-  attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+  attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "use-soft-float"="false" }
   attributes #1 = { nounwind readnone }
 
   !llvm.dbg.cu = !{!0}