Use TestExtras macro

Author: kshyatt

test/testsuite/TestSuite.jl

@@ -58,11 +58,6 @@ isleftnull(N, A; atol::Real = 0, rtol::Real = precision(eltype(A))) =
 isrightnull(Nᴴ, A; atol::Real = 0, rtol::Real = precision(eltype(A))) =
     isapprox(norm(A * Nᴴ'), 0; atol = max(atol, norm(A) * rtol))
 
-# TODO: actually make this a test
-macro testinferred(ex)
-    return esc(:(@inferred $ex))
-end
-
 include("qr.jl")
 include("lq.jl")