Revert "Add PR labels based on files changed (#1127)" (#1128)

This reverts commit c296b4c348.

script/pr-labels

@@ -1,29 +0,0 @@
-#!/bin/bash
-
-components=()
-for c_diff in $(git diff ${1}..${2} --name-only esphome/components); do
-  base=${c_diff#esphome/components/}
-  component=`dirname ${base}`
-
-  if [[ "${component}" == "." ]]; then
-    component=${platform}
-  fi
-
-  if [[ ! "${components[@]}" =~ "${component}" ]]; then
-    components+=($component)
-  fi
-done
-
-labels=()
-
-echo "Components:"
-for component in ${components[@]}; do
-  echo "  ${component}"
-  labels+=("component: $component")
-done
-
-echo "Labels: ${labels[@]}"
-
-output=$(printf '%s\n' "${labels[@]}" | jq -R . | jq -c -s .)
-
-echo "::set-output name=labels::${output}"