benchmark: Remove unnecessary import and export macros from benchmark executables

Summary:
Benchmark executables do not need to export and import symbols because
they are not loaded by other executables. Removing is important because
EAPI will be removed in some later commit and would break benchmark
executables.

=  The Rationale =

This patch is from a series of patches to rename EAPI symbols to
specific library DSOs.

EAPI was designed to be able to pass
`__attribute__ ((visibility ("default")))` for symbols with
GCC, which would mean that even if -fvisibility=hidden was used
when compiling the library, the needed symbols would get exported.

MSVC __almost__ works like GCC (or mingw) in which you can
declare everything as export and it will just work (slower, but
it will work). But there's a caveat: global variables will not
work the same way for MSVC, but works for mingw and GCC.

For global variables (as opposed to functions), MSVC requires
correct DSO visibility for MSVC: instead of declaring a symbol as
export for everything, you need to declare it as import when
importing from another DSO and export when defining it locally.

With current EAPI definitions, we get the following example
working in mingw and MSVC (observe it doesn't define any global
variables as exported symbols).

Example 1:
dll1:
```
EAPI void foo(void);

EAPI void bar()
{
  foo();
}
```
dll2:
```
EAPI void foo()
{
  printf ("foo\n");
}
```

This works fine with API defined as __declspec(dllexport) in both
cases and for gcc defining as
`__atttribute__((visibility("default")))`.

However, the following:
Example 2:

dll1:

```
EAPI extern int foo;
EAPI void foobar(void);

EAPI void bar()
{
  foo = 5;
  foobar();
}
```

dll2:

```
EAPI int foo = 0;
EAPI void foobar()
{
  printf ("foo %d\n", foo);
}
```

This will work on mingw but will not work for MSVC. And that's why
LIBAPI is the only solution that works for MSVC.

Co-authored-by: João Paulo Taylor Ienczak Zanette <jpaulotiz@gmail.com>
Co-authored-by: Lucas Cavalcante de Sousa <lucks.sousa@gmail.com>
Co-authored-by: Ricardo Campos <ricardo.campos@expertise.dev>

Reviewers: vtorri, woohyun, jptiz, lucas

Reviewed By: vtorri

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D12200

src/benchmarks/eo/class_simple.c

@@ -7,8 +7,8 @@
 
 #define MY_CLASS SIMPLE_CLASS
 
-EOAPI const Efl_Event_Description _SIMPLE_FOO = EFL_EVENT_DESCRIPTION("foo");
-EOAPI const Efl_Event_Description _SIMPLE_BAR = EFL_EVENT_DESCRIPTION("bar");
+const Efl_Event_Description _SIMPLE_FOO = EFL_EVENT_DESCRIPTION("foo");
+const Efl_Event_Description _SIMPLE_BAR = EFL_EVENT_DESCRIPTION("bar");
 
 static void
 _other_call(Eo *obj EINA_UNUSED, void *class_data EINA_UNUSED, Eo *other, int times)
@@ -19,7 +19,7 @@ _other_call(Eo *obj EINA_UNUSED, void *class_data EINA_UNUSED, Eo *other, int ti
      }
 }
 
-EAPI EFL_VOID_FUNC_BODYV(simple_other_call, EFL_FUNC_CALL(other, times), Eo *other, int times);
+EFL_VOID_FUNC_BODYV(simple_other_call, EFL_FUNC_CALL(other, times), Eo *other, int times);
 
 static void
 _a_set(Eo *obj EINA_UNUSED, void *class_data, int a)
@@ -28,7 +28,7 @@ _a_set(Eo *obj EINA_UNUSED, void *class_data, int a)
    pd->a = a;
 }
 
-EAPI EFL_VOID_FUNC_BODYV(simple_a_set, EFL_FUNC_CALL(a), int a);
+EFL_VOID_FUNC_BODYV(simple_a_set, EFL_FUNC_CALL(a), int a);
 
 static Eina_Bool
 _class_initializer(Efl_Class *klass)

src/benchmarks/eo/class_simple.h

@@ -6,16 +6,16 @@ typedef struct
    int a;
 } Simple_Public_Data;
 
-EAPI void simple_a_set(Eo *self, int a);
+void simple_a_set(Eo *self, int a);
 /* Calls simple_other_call(other, obj) and then simple_other_call(obj, other)
  * for 'times' times in order to grow the call stack on other objects. */
-EAPI void simple_other_call(Eo*self, Eo *other, int times);
+void simple_other_call(Eo*self, Eo *other, int times);
 
 #define SIMPLE_CLASS simple_class_get()
 const Efl_Class *simple_class_get(void);
 
-EOAPI extern const Efl_Event_Description _SIMPLE_FOO;
-EOAPI extern const Efl_Event_Description _SIMPLE_BAR;
+extern const Efl_Event_Description _SIMPLE_FOO;
+extern const Efl_Event_Description _SIMPLE_BAR;
 
 #define SIMPLE_FOO (&(_SIMPLE_FOO))
 #define SIMPLE_BAR (&(_SIMPLE_BAR))