Remove requirements/*.txt - use pip install ocrmypdf[etc] instead

requirements/main.txt

@@ -1,9 +0,0 @@
-# Deprecated and not maintained; use "pip install ocrmypdf" instead
-coloredlogs == 15.0  # technically optional
-img2pdf == 0.4.0
-pdfminer.six == 20201018
-pikepdf == 2.10.0
-pluggy == 0.13.1
-Pillow == 8.3.2
-reportlab == 3.5.66
-tqdm == 4.59.0

requirements/test.txt

@@ -1,7 +0,0 @@
-# Deprecated and not maintained; use "pip install ocrmypdf[test]" instead
-pytest >= 6.0.0
-pytest-xdist >= 2.2.0
-pytest-cov >= 2.11.1
-python-xmp-toolkit == 2.0.1  # requires apt-get install libexempi3
-                     # or brew install exempi
-#PyMuPDF == 1.13.4    # optional

requirements/watcher.txt

@@ -1,2 +0,0 @@
-# Deprecated and not maintained; use "pip install ocrmypdf[watcher]" instead
-watchdog == 1.0.2

requirements/webservice.txt

@@ -1,2 +0,0 @@
-# Deprecated and not maintained; use "pip install ocrmypdf[webservice]" instead
-Flask >= 1, < 2