libbpf_android/Loader.cpp - fix a clang warning (clang-analyzer-deadcode.DeadStores)

//system/bpf/libbpf_android:libbpf_android clang-tidy Loader.cpp
system/bpf/libbpf_android/Loader.cpp:133:5: warning: Value stored to 'entries' is never read [clang-analyzer-deadcode.DeadStores]
    entries = shTable.size();
    ^
system/bpf/libbpf_android/Loader.cpp:133:5: note: Value stored to 'entries' is never read

Test: builds without warnings
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I548976b59d44a51e992c9520e730fc9dae82fce2
diff --git a/libbpf_android/Loader.cpp b/libbpf_android/Loader.cpp
index 8a66c29..43bd1da 100644
--- a/libbpf_android/Loader.cpp
+++ b/libbpf_android/Loader.cpp
@@ -126,11 +126,8 @@
 /* Read a section by its index - for ex to get sec hdr strtab blob */
 static int readSectionByIdx(ifstream& elfFile, int id, vector<char>& sec) {
     vector<Elf64_Shdr> shTable;
-    int entries, ret = 0;
-
-    ret = readSectionHeadersAll(elfFile, shTable);
+    int ret = readSectionHeadersAll(elfFile, shTable);
     if (ret) return ret;
-    entries = shTable.size();
 
     elfFile.seekg(shTable[id].sh_offset);
     if (elfFile.fail()) return -1;
@@ -144,9 +141,7 @@
 /* Read whole section header string table */
 static int readSectionHeaderStrtab(ifstream& elfFile, vector<char>& strtab) {
     Elf64_Ehdr eh;
-    int ret = 0;
-
-    ret = readElfHeader(elfFile, &eh);
+    int ret = readElfHeader(elfFile, &eh);
     if (ret) return ret;
 
     ret = readSectionByIdx(elfFile, eh.e_shstrndx, strtab);