Remove pdf.ttf file references

This file is not used anymore in Tesseract 5.

README.md

@@ -18,7 +18,6 @@ This project uses additional libraries (with their own specific licenses):
  - Android 4.1 (API 16) or higher
  - A v4.0.0 [trained data file(s)][tessdata] for language(s) you want to use. Data files must be
 copied to the Android device to a directory named `tessdata`.
- - If you want to use PdfRenderer, copy also [pdf.ttf][pdffile] file to the `tessdata` directory.
  - Application must hold permission `READ_EXTERNAL_STORAGE` to access `tessdata` directory.
 
 ## Usage
@@ -75,4 +74,3 @@ To build the release version of the library, use task `tesseract4android:assembl
 [jpeg]: http://libjpeg.sourceforge.net/
 [png]: http://www.libpng.org/pub/png/libpng.html
 [tessdata]: https://github.com/tesseract-ocr/tessdata/tree/4.0.0
-[pdffile]: https://github.com/tesseract-ocr/tesseract/blob/master/tessdata/pdf.ttf

tesseract4android/src/androidTest/java/com/googlecode/tesseract/android/TessPdfRendererTest.java

@@ -73,10 +73,6 @@ public void testCreate() {
 		new File(OUTPUT_PATH + pdfBasename + ".pdf").delete();
 	}
 
-	/**
-	 * NOTE: This test requires pdf.ttf file to be in tessdata folder.
-	 * File could be downloaded from: https://github.com/tesseract-ocr/tesseract/blob/master/tessdata/pdf.ttf
-	 */
 	@Test
 	public void testAddPageToDocument() throws IOException {
 		// Attempt to initialize the API.