delete redundant comparison function methods for BigFloat (#59505)

These are not necessary for either correctness or performance, and are
the only such redundant methods in the sysimage.

Author: oscardssmith

base/mpfr.jl

@@ -990,9 +990,7 @@ end
 # Utility functions
 ==(x::BigFloat, y::BigFloat) = ccall((:mpfr_equal_p, libmpfr), Int32, (Ref{BigFloat}, Ref{BigFloat}), x, y) != 0
 <=(x::BigFloat, y::BigFloat) = ccall((:mpfr_lessequal_p, libmpfr), Int32, (Ref{BigFloat}, Ref{BigFloat}), x, y) != 0
->=(x::BigFloat, y::BigFloat) = ccall((:mpfr_greaterequal_p, libmpfr), Int32, (Ref{BigFloat}, Ref{BigFloat}), x, y) != 0
 <(x::BigFloat, y::BigFloat) = ccall((:mpfr_less_p, libmpfr), Int32, (Ref{BigFloat}, Ref{BigFloat}), x, y) != 0
->(x::BigFloat, y::BigFloat) = ccall((:mpfr_greater_p, libmpfr), Int32, (Ref{BigFloat}, Ref{BigFloat}), x, y) != 0
 
 function cmp(x::BigFloat, y::BigInt)
     isnan(x) && return 1

test/core.jl

@@ -8615,6 +8615,11 @@ module M57638_3
 end
 @test M57638_3.x === 1
 
+@testset "no unnecessary methods for comparison functions with generically correct and performant fallback methods" begin
+    @test (isone ∘ length ∘ methods)(>, Tuple{Any, Any})
+    @test (isone ∘ length ∘ methods)(>=, Tuple{Any, Any})
+end
+
 module GlobalBindingMulti
     module M
         export S