vulkan: delete dead code

ggml_vk_create_buffer_temp is not used anywhere, and it is the only
caller for ggml_vk_pool_malloc.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Author: giuseppe

ggml/src/ggml-vulkan/ggml-vulkan.cpp

@@ -1311,7 +1311,6 @@ struct ggml_vk_garbage_collector {
     std::vector<vk_semaphore> tl_semaphores;
     std::vector<vk_semaphore> semaphores;
     std::vector<vk::Event> events;
-    std::vector<vk_buffer> temp_buffers;
     std::vector<vk_context> contexts;
 };
 
@@ -5144,40 +5143,6 @@ static vk_pipeline ggml_vk_get_dequantize_mul_mat_vec_id(ggml_backend_vk_context
     return ctx->device->pipeline_dequant_mul_mat_vec_id_f32[a_type];
 }
 
-static vk_buffer ggml_vk_pool_malloc(ggml_backend_vk_context * ctx, size_t size) {
-    VK_LOG_DEBUG("ggml_vk_pool_malloc(" << size << ")");
-    VK_LOG_MEMORY("ggml_vk_pool_malloc");
-
-    int best_i = -1;
-    size_t best_size = std::numeric_limits<size_t>::max(); //smallest unused buffer that fits our needs
-    int worst_i = -1;
-    size_t worst_size = 0; //largest unused buffer seen so far
-    for (int i = 0; i < MAX_VK_BUFFERS; ++i) {
-        vk_buffer &b = ctx->buffer_pool[i];
-        if (b != nullptr && b->size >= size && b->size < best_size) {
-            best_i = i;
-            best_size = b->size;
-        }
-        if (b != nullptr && b->size > worst_size) {
-            worst_i = i;
-            worst_size = b->size;
-        }
-    }
-    if(best_i != -1) {
-        //found the smallest buffer that fits our needs
-        vk_buffer b = ctx->buffer_pool[best_i];
-        ctx->buffer_pool[best_i].reset();
-        return b;
-    }
-    if(worst_i != -1) {
-        //no buffer that fits our needs, resize largest one to save memory
-        vk_buffer& b = ctx->buffer_pool[worst_i];
-        ggml_vk_destroy_buffer(b);
-    }
-
-    return ggml_vk_create_buffer_device(ctx->device, size);
-}
-
 static void ggml_vk_pool_free(ggml_backend_vk_context * ctx, vk_buffer& buffer) {
     VK_LOG_DEBUG("ggml_vk_pool_free(" << buffer->size << ")");
     for (int i = 0; i < MAX_VK_BUFFERS; ++i) {
@@ -5191,24 +5156,6 @@ static void ggml_vk_pool_free(ggml_backend_vk_context * ctx, vk_buffer& buffer)
     ggml_vk_destroy_buffer(buffer);
 }
 
-// Returns an available temporary buffer that may only be used temporarily, it will be reused
-static vk_buffer ggml_vk_create_buffer_temp(ggml_backend_vk_context * ctx, size_t size) {
-    // Try to find existing temp buffer with enough capacity
-    for (auto& buffer : ctx->gc.temp_buffers) {
-        if (buffer->size >= size) {
-            return buffer;
-        }
-    }
-
-    VK_LOG_MEMORY("ggml_vk_create_buffer_temp(" << size << ")");
-
-    // Otherwise create new buffer
-    vk_buffer buf = ggml_vk_pool_malloc(ctx, size);
-    ctx->gc.temp_buffers.push_back(buf);
-
-    return buf;
-}
-
 static void * ggml_vk_host_malloc(vk_device& device, size_t size) {
     VK_LOG_MEMORY("ggml_vk_host_malloc(" << size << ")");
     vk_buffer buf = ggml_vk_create_buffer(device, size,
@@ -11789,10 +11736,6 @@ static bool ggml_vk_compute_forward(ggml_backend_vk_context * ctx, ggml_cgraph *
 // Clean up after graph processing is done
 static void ggml_vk_graph_cleanup(ggml_backend_vk_context * ctx) {
     VK_LOG_DEBUG("ggml_vk_graph_cleanup()");
-    for (auto& buffer : ctx->gc.temp_buffers) {
-        ggml_vk_pool_free(ctx, buffer);
-    }
-    ctx->gc.temp_buffers.clear();
     ctx->prealloc_y_last_pipeline_used = {};
 
     ctx->unsynced_nodes_written.clear();