Perform driver initialization as part of ccall library lookup.

lib/cudadrv/CUDAdrv.jl

@@ -19,6 +19,8 @@ function libcuda()
                          Typically, that involves an entry in '/etc/ld.so.conf', or setting LD_LIBRARY_PATH.""")
             end
         end
+
+        cuInit(0)
     end
 
     # memoized because otherwise each ccall would perform discovery again

lib/cudadrv/error.jl

@@ -76,20 +76,6 @@ Base.show(io::IO, ::MIME"text/plain", err::CuError) = print(io, "CuError($(err.c
 
 ## API call wrapper
 
-const __initialized_driver = LazyInitialized{Bool}()
-@inline function initialize_api()
-    get!(__initialized_driver; hook=__init_driver__) do
-        if haskey(ENV, "_") && basename(ENV["_"]) == "rr"
-            @error("Running under rr, which is incompatible with CUDA")
-            return false
-        end
-        cuInit(0)
-
-        return true
-    end
-    return
-end
-
 @inline function initialize_context()
     prepare_cuda_state()
     return