rfctr(html): clean html tests in prep for PRs to follow (#3156)

**Summary**
Clean `tests_unstructured/partition/test_html.py` in preparation for
broader refactor of HTML partitioner to follow. That refactor will
address a cluster of bugs.

Temporarily remove blank lines in tests so reordering tests in following
commit is easier to follow. Those will go back in after that.

Author: scanny

CHANGELOG.md

@@ -1,4 +1,4 @@
-## 0.14.5-dev2
+## 0.14.5-dev3
 
 ### Enhancements
 

Makefile

@@ -312,13 +312,12 @@ test-unstructured-api-unit:
 	scripts/test-unstructured-api-unit.sh
 
 .PHONY: test-no-extras
-# TODO(newelh) Add json test when fixed
 test-no-extras:
 	PYTHONPATH=. CI=$(CI) \
 		UNSTRUCTURED_INCLUDE_DEBUG_METADATA=$(UNSTRUCTURED_INCLUDE_DEBUG_METADATA) pytest \
 		test_${PACKAGE_NAME}/partition/test_text.py \
 		test_${PACKAGE_NAME}/partition/test_email.py \
-		test_${PACKAGE_NAME}/partition/test_html_partition.py \
+		test_${PACKAGE_NAME}/partition/test_html.py \
 		test_${PACKAGE_NAME}/partition/test_xml_partition.py
 
 .PHONY: test-extra-csv