wifi: remove unnecessary debug dump

Since design was adjusted, we are no longer need
to cat dump_start when bugreport be triggered.

Bug: 256746618
Test: Trigger bugreport and check debug files.
Change-Id: I907e707be99a35bfd76dfdb5f9bd693cb4b471d8
Signed-off-by: Roger Wang <wangroger@google.com>

dumpstate/Dumpstate.cpp

@@ -248,7 +248,6 @@ void endSection(int fd, const std::string &sectionName, timepoint_t startTime) {
 Dumpstate::Dumpstate()
   : mTextSections{
         { "pre-touch", [this](int fd) { dumpPreTouchSection(fd); } },
-        { "wlan", [this](int fd) { dumpWlanSection(fd); } },
         { "memory", [this](int fd) { dumpMemorySection(fd); } },
         { "Devfreq", [this](int fd) { dumpDevfreqSection(fd); } },
         { "cpu", [this](int fd) { dumpCpuSection(fd); } },
@@ -320,12 +319,6 @@ void Dumpstate::dumpTextSection(int fd, const std::string &sectionName) {
                                    "not avalable from the command line.\n", fd);
 }
 
-// Dump items related to wlan
-void Dumpstate::dumpWlanSection(int fd) {
-    RunCommandToFd(fd, "WLAN Debug Dump", {"/vendor/bin/sh", "-c",
-                   "cat /sys/wifi/dump_start"});
-}
-
 // Dump items related to power and battery
 void Dumpstate::dumpPowerSection(int fd) {
     struct stat buffer;