chore: remove 1.8 checks

Author: avik-pal

src/dual.jl

@@ -298,16 +298,9 @@ Base.copy(d::Dual) = d
 Base.eps(d::Dual) = eps(value(d))
 Base.eps(::Type{D}) where {D<:Dual} = eps(valtype(D))
 
-# The `base` keyword was added in Julia 1.8:
-# https://github.com/JuliaLang/julia/pull/42428
-if VERSION < v"1.8.0-DEV.725"
-    Base.precision(d::Dual) = precision(value(d))
-    Base.precision(::Type{D}) where {D<:Dual} = precision(valtype(D))
-else
-    Base.precision(d::Dual; base::Integer=2) = precision(value(d); base=base)
-    function Base.precision(::Type{D}; base::Integer=2) where {D<:Dual}
-        precision(valtype(D); base=base)
-    end
+Base.precision(d::Dual; base::Integer=2) = precision(value(d); base=base)
+function Base.precision(::Type{D}; base::Integer=2) where {D<:Dual}
+    precision(valtype(D); base=base)
 end
 
 function Base.nextfloat(d::ForwardDiff.Dual{T,V,N}) where {T,V,N}

test/DualTest.jl

@@ -118,12 +118,10 @@ ForwardDiff.:≺(::Type{OuterTestTag}, ::Type{TestTag}) = false
         @test precision(typeof(FDNUM)) === precision(V)
         @test precision(NESTED_FDNUM) === precision(PRIMAL)
         @test precision(typeof(NESTED_FDNUM)) === precision(V)
-        if VERSION >= v"1.8.0-DEV.725" # https://github.com/JuliaLang/julia/pull/42428
-            @test precision(FDNUM; base=10) === precision(PRIMAL; base=10)
-            @test precision(typeof(FDNUM); base=10) === precision(V; base=10)
-            @test precision(NESTED_FDNUM; base=10) === precision(PRIMAL; base=10)
-            @test precision(typeof(NESTED_FDNUM); base=10) === precision(V; base=10)
-        end
+        @test precision(FDNUM; base=10) === precision(PRIMAL; base=10)
+        @test precision(typeof(FDNUM); base=10) === precision(V; base=10)
+        @test precision(NESTED_FDNUM; base=10) === precision(PRIMAL; base=10)
+        @test precision(typeof(NESTED_FDNUM); base=10) === precision(V; base=10)
 
         @test floor(Int, FDNUM) === floor(Int, PRIMAL)
         @test floor(Int, FDNUM2) === floor(Int, PRIMAL2)