[CI] Remove lint step from unity/pr-head step

This step should only be performed as part of the `lint/pr-head` CI
step.  It was included as part of the unity-specific CI steps prior to
merging of unity into main.  It is no longer necessary as part of
`unity/pr-head`.

ci/jenkins/unity_jenkinsfile.groovy

@@ -171,64 +171,6 @@ def should_skip_ci(pr_number) {
 
 cancel_previous_build()
 
-def lint(node_type) {
-  stage('Prepare') {
-    node(node_type) {
-      // When something is provided in ci_*_param, use it, otherwise default with ci_*
-      ci_lint = params.ci_lint_param ?: ci_lint
-      ci_cpu = params.ci_cpu_param ?: ci_cpu
-      ci_gpu = params.ci_gpu_param ?: ci_gpu
-      ci_wasm = params.ci_wasm_param ?: ci_wasm
-      ci_i386 = params.ci_i386_param ?: ci_i386
-      ci_qemu = params.ci_qemu_param ?: ci_qemu
-      ci_arm = params.ci_arm_param ?: ci_arm
-      ci_hexagon = params.ci_hexagon_param ?: ci_hexagon
-
-      sh(script: """
-        echo "Docker images being used in this build:"
-        echo " ci_lint = ${ci_lint}"
-        echo " ci_cpu  = ${ci_cpu}"
-        echo " ci_gpu  = ${ci_gpu}"
-        echo " ci_wasm = ${ci_wasm}"
-        echo " ci_i386 = ${ci_i386}"
-        echo " ci_qemu = ${ci_qemu}"
-        echo " ci_arm  = ${ci_arm}"
-        echo " ci_hexagon  = ${ci_hexagon}"
-        """, label: 'Docker image names')
-    }
-  }
-
-  stage('Sanity Check') {
-    timeout(time: max_time, unit: 'MINUTES') {
-      node(node_type) {
-        ws(per_exec_ws('tvm/sanity')) {
-          init_git()
-          is_docs_only_build = sh(
-            returnStatus: true,
-            script: './tests/scripts/git_change_docs.sh',
-            label: 'Check for docs only changes',
-          )
-          skip_ci = should_skip_ci(env.CHANGE_ID)
-          skip_slow_tests = should_skip_slow_tests(env.CHANGE_ID)
-          sh(
-            script: "${docker_run} ${ci_lint}  ./tests/scripts/task_lint.sh",
-            label: 'Run lint',
-          )
-          sh(
-            script: "${docker_run} ${ci_lint}  ./tests/scripts/unity/task_extra_lint.sh",
-            label: 'Run extra lint',
-          )
-        }
-      }
-    }
-  }
-}
-
-try {
-  lint('CPU-SMALL-SPOT')
-} catch (Exception ex) {
-  lint('CPU-SMALL')
-}
 
 // Run make. First try to do an incremental make from a previous workspace in hope to
 // accelerate the compilation. If something is wrong, clean the workspace and then