dev-tex/tex4ht: remove unused patch

Signed-off-by: Michael Mair-Keimberger <mmk@levelnine.at>
Closes: https://github.com/gentoo/gentoo/pull/39685
Signed-off-by: Florian Schmaus <flow@gentoo.org>

dev-tex/tex4ht/files/tex4ht-invalid-read.patch

@@ -1,35 +0,0 @@
-Avoid invalid read and uninitialized comparisons
-https://bugs.gentoo.org/915782
-https://puszcza.gnu.org.ua/bugs/?611
-
-This backports the following upstream commits:
-
-r1387
-Author: karl
-Date: Thu Oct 12 16:10:29 2023 UTC
-avoid negative index into font_tbl
-
-r1391
-Author: karl
-Date: Fri Oct 13 22:34:24 2023 UTC
-zero htf_4hf array to avoid uninitialized reads
-
---- tex4ht-1.0.2009_06_11_1038/src/tex4ht.c
-+++ tex4ht-1.0.2009_06_11_1038/src/tex4ht.c
-@@ -7039,6 +7039,7 @@
- 
- max_htf_4hf_n = 256;
- htf_4hf = m_alloc(struct htf_4hf_rec, 256);
-+memset (htf_4hf, 0, 256 * sizeof (struct htf_4hf_rec));
- 
- 
-       
-@@ -8738,7 +8739,7 @@
- 
-    
- if( span_on && !in_span_ch  && !ignore_chs && !in_accenting
--            && (default_font != font_tbl[cur_fnt].num) ){
-+            && cur_fnt >= 0 && (default_font != font_tbl[cur_fnt].num) ){
-   if(  (ch < 137) && (ch != 
- 132 
- ) ){