remove docs for containsText

Bug: skia:
Change-Id: I08f2586e34c51a0a98d5f962e5f37691cd87c5f9
Reviewed-on: https://skia-review.googlesource.com/c/188624
Reviewed-by: Mike Reed <reed@google.com>

Author: reed-at-google

docs/SkFont_Reference.bmh

@@ -709,7 +709,7 @@ Whether edge pixels draw opaque or with partial transparency.
 
 # ------------------------------------------------------------------------------
 
-#Method uint16_t unicharToGlyph(SkUnichar uni) const
+#Method SkGlyphID unicharToGlyph(SkUnichar uni) const
 #In incomplete
 #Line # incomplete ##
 
@@ -746,59 +746,6 @@ Whether edge pixels draw opaque or with partial transparency.
 
 # ------------------------------------------------------------------------------
 
-#Method bool containsText(const void* text, size_t byteLength, SkTextEncoding encoding) const
-#In Utility
-#Line # returns if all text corresponds to Glyphs ##
-#Populate
-
-#NoExample
-    #Description
-    containsText succeeds for degree symbol, but cannot find a glyph index
-    corresponding to the Unicode surrogate code point.
-    ##
-    SkFont font;
-    const uint16_t goodChar = 0x00B0;  // degree symbol
-    const uint16_t badChar = 0xD800;   // Unicode surrogate
-    SkDebugf("0x%04x %c= has char\n", goodChar,
-            font.containsText(&goodChar, 2, SkTextEncoding::kUTF16) ? '=' : '!');
-    SkDebugf("0x%04x %c= has char\n", badChar,
-            font.containsText(&badChar, 2, SkTextEncoding::kUTF16) ? '=' : '!');
-
-    #StdOut
-        0x00b0 == has char
-        0xd800 != has char
-    ##
-##
-
-#Example
-    #Description
-    containsText returns true that glyph index is greater than zero, not
-    that it corresponds to an entry in Typeface.
-    ##
-    SkFont font;
-    const uint16_t goodGlyph = 511;
-    const uint16_t zeroGlyph = 0;
-    const uint16_t badGlyph = 65535; // larger than glyph count in font
-    SkDebugf("0x%04x %c= has glyph\n", goodGlyph,
-            font.containsText(&goodGlyph, 2, SkTextEncoding::kGlyphID) ? '=' : '!');
-    SkDebugf("0x%04x %c= has glyph\n", zeroGlyph,
-            font.containsText(&zeroGlyph, 2, SkTextEncoding::kGlyphID) ? '=' : '!');
-    SkDebugf("0x%04x %c= has glyph\n", badGlyph,
-            font.containsText(&badGlyph, 2, SkTextEncoding::kGlyphID) ? '=' : '!');
-
-    #StdOut
-        0x01ff == has glyph
-        0x0000 != has glyph
-        0xffff == has glyph
-    ##
-##
-
-#SeeAlso incomplete
-
-#Method ##
-
-# ------------------------------------------------------------------------------
-
 #Method SkScalar measureText(const void* text, size_t byteLength, SkTextEncoding encoding,
                          SkRect* bounds = nullptr) const
 #In incomplete