Disable NVTX gc callbacks

These are not used, but theys still increase ttfx

Author: imreddyTeja

.buildkite/benchmarks/pipeline.yml

@@ -4,7 +4,6 @@ agents:
   modules: climacommon/2025_05_15
 
 env:
-  JULIA_NVTX_CALLBACKS: gc
   OPENBLAS_NUM_THREADS: 1
   OMPI_MCA_opal_warn_on_missing_libcuda: 0
   SLURM_KILL_BAD_EXIT: 1

.buildkite/hierarchies/pipeline.yml

@@ -6,7 +6,6 @@ agents:
 env:
   JULIA_LOAD_PATH: "${JULIA_LOAD_PATH}:${BUILDKITE_BUILD_CHECKOUT_PATH}/.buildkite"
   OPENBLAS_NUM_THREADS: 1
-  JULIA_NVTX_CALLBACKS: gc
   OMPI_MCA_opal_warn_on_missing_libcuda: 0
   JULIA_MAX_NUM_PRECOMPILE_FILES: 100
   GKSwstype: 100

.buildkite/longruns/pipeline.yml

@@ -6,7 +6,6 @@ agents:
 env:
   JULIA_LOAD_PATH: "${JULIA_LOAD_PATH}:${BUILDKITE_BUILD_CHECKOUT_PATH}/.buildkite"
   OPENBLAS_NUM_THREADS: 1
-  JULIA_NVTX_CALLBACKS: gc
   OMPI_MCA_opal_warn_on_missing_libcuda: 0
   JULIA_MAX_NUM_PRECOMPILE_FILES: 100
   GKSwstype: 100

.buildkite/pipeline.yml

@@ -7,7 +7,6 @@ env:
   JULIA_LOAD_PATH: "${JULIA_LOAD_PATH}:${BUILDKITE_BUILD_CHECKOUT_PATH}/.buildkite"
   JULIA_DEPOT_PATH: "${BUILDKITE_BUILD_PATH}/${BUILDKITE_PIPELINE_SLUG}/depot/cpu"
   OPENBLAS_NUM_THREADS: 1
-  JULIA_NVTX_CALLBACKS: gc
   OMPI_MCA_opal_warn_on_missing_libcuda: 0
   JULIA_MAX_NUM_PRECOMPILE_FILES: 100
   GKSwstype: 100