Remove CL_CONTEXT_COMPILER_MODE_SIMULATION_INTELFPGA

This compiler mode (simulation mode, mode 6) is unused by the runtime and hence safe to remove. I am removing it so that the differences between simulation devices and hardware devices are removed as much as possible, this is part of the effort of https://github.com/sophimao/applications.fpga.oneapi.products.acl-docs/blob/sim-auto-select/FDs/usability/hld_usability_simulation_device_auto_selection_fd.md

When we search for the compiler mode on Google, nothing returned, so it's also not documented anywhere.

Tests Done:
Runtime Unit Tests
Checked that products/regtest/hld does not have lines like "compiler_mode => 6" or "compiler_mode => '6'"

Author: intel-liudean

include/acl_types.h

@@ -198,8 +198,7 @@ typedef cl_ulong acl_object_magic_t;
 //  scenario during runtime.
 #define CL_CONTEXT_COMPILER_MODE_ONLINE_INTELFPGA 4
 #define CL_CONTEXT_COMPILER_MODE_SPLIT_KERNEL_INTELFPGA 5
-#define CL_CONTEXT_COMPILER_MODE_SIMULATION_INTELFPGA 6
-#define CL_CONTEXT_COMPILER_MODE_NUM_MODES_INTELFPGA 7
+#define CL_CONTEXT_COMPILER_MODE_NUM_MODES_INTELFPGA 6
 
 typedef enum {
   ACL_COMPILER_MODE_OFFLINE = CL_CONTEXT_COMPILER_MODE_OFFLINE_INTELFPGA,
@@ -212,7 +211,6 @@ typedef enum {
   ACL_COMPILER_MODE_ONLINE = CL_CONTEXT_COMPILER_MODE_ONLINE_INTELFPGA,
   ACL_COMPILER_MODE_SPLIT_KERNEL =
       CL_CONTEXT_COMPILER_MODE_SPLIT_KERNEL_INTELFPGA,
-  ACL_COMPILER_MODE_SIMULATION = CL_CONTEXT_COMPILER_MODE_SIMULATION_INTELFPGA,
   ACL_COMPILER_MODE_NUM_MODES = CL_CONTEXT_COMPILER_MODE_NUM_MODES_INTELFPGA
 } acl_compiler_mode_t;
 

src/acl_program.cpp

@@ -1350,7 +1350,7 @@ static cl_int l_build_program_for_device(cl_program program,
     }
     // num_global_mem_systems of device binary autodiscovery def will remain 0
     // only when CL_CONTEXT_COMPILER_MODE_INTELFPGA is
-    // ACL_COMPILER_MODE_PRELOADED_BINARY_ONLY or ACL_COMPILER_MODE_SIMULATION,
+    // ACL_COMPILER_MODE_PRELOADED_BINARY_ONLY,
     // in these situations we should only use num_global_memory_system of device
     // autodiscovery def which would be initialized with acl_kernel_if_init by
     // reading the autodiscovery string of the bitstream currently programmed on

test/acl_context_test.cpp

@@ -948,7 +948,7 @@ MT_TEST(Context, compiler_mode) {
       {"x", false, false}, {"x1", false, false}, {"-1", false, false},
       {"0", true, true},   {"1", true, true},    {"2", true, true},
       {"3", true, true},   {"4", true, true},    {"5", true, true},
-      {"6", true, true},   {"7", true, false}};
+      {"6", true, false}};
 
   for (unsigned ienv = 0; ienv < sizeof(envvals) / sizeof(envvals[0]); ienv++) {
     // don't set env vars until all threads are ready to use it