Update jacobi.jl

Author: putianyi889

src/classical/jacobi.jl

@@ -318,19 +318,6 @@ function _jacobi_convert_b(a, b, k, T) # Jacobi(a, b+k) \ Jacobi(a, b)
     end
 end
 
-"""
-    _approx_integer(x; kw...)
-
-Returns `y::Integer` such that `isapprox(x,y; kw...)` is `true`. Throws `InexactError` if `y` does not exist.
-"""
-function _approx_integer(x; kw...)
-    y = round(x)
-    if !isapprox(x,y; kw...)
-        throw(InexactError(_approx_integer, x))
-    end
-    Integer(y)
-end
-
 function \(A::Jacobi, B::Jacobi)
     T = promote_type(eltype(A), eltype(B))
     aa, ab = A.a, A.b