remove explore-assets/deposit folder and update submodules

explore/src/app/openaireLibrary

@@ -1 +1 @@
-Subproject commit d9b8ea04765cf1a81eb7eaad5a3317333194014d
+Subproject commit 18b403bec044e2b4c803f9a19d54f9e0e408c3d9

explore/src/assets/common-assets

@@ -1 +1 @@
-Subproject commit 787970f735d48efc65e4408fe4eb5803e57021aa
+Subproject commit d6fd642f214ce91e0eefaa06a9e8b50fedf9b7d8

explore/src/assets/explore-assets/deposit/step-numbers-deposit.svg

@@ -1,9 +0,0 @@
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