Merge pull request #63 from odidev/odidev_aarch64

Add Linux AArch64 wheel build support

src/script_span/getonescriptspan.cc

diff --git a/src/script_span/getonescriptspan.cc b/src/script_span/getonescriptspan.cc
index 4607bd8..715616d 100644
--- a/src/script_span/getonescriptspan.cc
+++ b/src/script_span/getonescriptspan.cc
@@ -878,7 +878,6 @@
   // copying letters to buffer with single spaces for each run of non-letters
   while (take < byte_length_) {
     // Copy run of letters in same script (&LS | LS)*
-    int letter_count = 0;              // Keep track of word length
     bool need_break = false;
 
     while (take < byte_length_) {
@@ -963,7 +962,6 @@
         map2original_.Delete(tlen - plen);
       }
 
-      ++letter_count;
       if (put >= kMaxScriptBytes) {
         // Buffer is full
         span->truncated = true;